Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/114798
Título: Effects of a submarine eruption on the performance of two brown seaweeds
Autores/as: Betancor, Séfora
Tuya Cortés, Fernando José 
Gil Díaz, Teba
Figueroa, Félix L.
Haroun Tabraue, Ricardo Jesús 
Clasificación UNESCO: 250621 Vulcanología
251001 Oceanografía biológica
251002 Oceanografía química
Fecha de publicación: 2014
Conferencia: IV Congress of Marine Sciences 
Resumen: World oceans are becoming more acidic as a consequence of CO2 anthropogenic emissions, with multiple physiological and ecological implications. So far, our understanding is mainly limited to some species through in vitro experimentation. In this study, we took advantage of a recent submarine eruption (from October 2011 to March 2012) at 1 nautical mile offshore El Hierro Island (Canary Islands, central east Atlantic) to determine whether altered physical–chemical conditions, mainly sudden natural ocean acidification, affected the morphology, photosynthesis (in situ Chl-a fluorescence) and physiological performance (photo-protective mechanisms and oxidative stress) of the conspicuous brown seaweeds Padina pavonica—a species with carbonate deposition – and Lobophora variegata—a species without carbonate on thallus surfaces – , both with similar morphology. Seaweeds were sampled twice: Novem- ber 2011 (eruptive phase with a pH drop of ca. 1.22 units relative to standard conditions) and March 2012 (post-eruptive phase with a pH of ca. 8.23), on two intertidal locations adjacent to the eruption and at a control location. P. pavonica showed decalcification and loss of photo-protective compounds and antioxidant activity at locations affected by the eruption, behaving as a sun-adapted species during lowered pH conditions. At the same time, L. variegata suffered a decrease in photo-protective compounds and antioxidant activity during the volcanic event, but its photosynthetic performance remained unaltered. These results reinforce the idea that calcareous seaweeds, as a whole, are more sensitive than non-calcareous seaweeds to alter their performance under scenarios of reduced pH.
URI: http://hdl.handle.net/10553/114798
ISBN: 84-697-0471-0
Fuente: Book of Abstracts submitted to the IV Congress of Marine Sciences. Las Palmas de Gran Canaria, June 11th to 13th 2014, p. 85
Colección:Actas de congresos
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